Every poker player at one time or another has accidentally mucked a winning hand. Usually it comes at the tail end of a long session, when fatigue has set in. We don't know how long Ben Delaney's opponent was playing before sitting down for this tournament at 12:30 today, but he accidentally (and unwittingly) mucked the nuts to allow Delaney to scoop a pot.
As Delaney recounted the hand, Delaney's opponent raised preflop to 550 and was called only by Delaney, in the big blind. The flop was a big one, coming down . Delaney checked, then called a bet of 1,100. Both players checked the turn. When the river fell , Delaney made a very healthy bet of 3,000. Delaney's opponent tanked before open-mucking . It seems probable that he thought he had two pair, aces and jacks, but he had actually made a runner-runner spade flush. Not only was it a flush, but it was also the nuts!